Maximum and minimum value of \( 2 \sin ^{2} \theta-3 \sin \theta+2 \) is - (W) (A) \( \frac{1}{4...

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Maximum and minimum value of \( 2 \sin ^{2} \theta-3 \sin \theta+2 \) is -
(W)
(A) \( \frac{1}{4},-\frac{7}{4} \)
(B) \( \frac{1}{4}, \frac{21}{4} \)
(C) \( \frac{21}{4},-\frac{3}{4} \)
(D) \( 7, \frac{7}{8} \)
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